Paraffining-machine



F. P. VAVRA.'A

PARAFFINING MACHINE. APPLICAUON'HLED JuLY 22,1918. RENEwED 110V..1.1919. 1,327,299.4

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3 SHEETS-'SH Patented Jan.

F. P. VAVRA.

F.Amrrmme MACHINE. APPLICATION HLED'YPULY-ZZ 1918' RENEWED NOVI hl'glg1,327,299. Patented Jan. 6,1920.

3 SHEETS-SHEET 3- mmm.

UNrrlrD sr 1:-

FRANK P. VAVRA, 0F CONGRESS PARK, ILLINOIS'.

rARAFrmING-MACHINE.

Application led July 22, 1918, Serial No. 246,0 1'5. l

To all whom it may concern: j

Be it known that I, FRANK P. VAVRA, acitizen of the United States,i anda resident of Congress Park, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inParaining-Machines, of which'the following is a full, clear, and exactspecication.

My invention is concerned with machines of the general type shown in.the Vavra Patent No. 1,198,976 for applying paraiiin or the like topaper or carton blanks, and is designed to prduce a machine ofthe classdescribed that shall be small, simple in its construction and yetcapable of doing entirely satisfactory work.

To this end it consists of a pair'of gaging rollers journaled in thesame or substantially the same horizontal plane, geared andspring-pressed together, and preferably both dipping into-a pair ofadjacent, but slightly separated tanks, orinto a common tank .having avertical discharge passage therethrough extending 'from between thediverging angle of the rolls to the bottom of the tank, in combinationwith a cooling water tank having one end thereof beneath the araliintank'or tanks so that the carton or lank passing down between therollers shall pass directly to the engaging angle of the cords thatcarry the cartons or blanks through the cooling water tank. .4

To conserve the heat, I preferably provide a cover for the tank ortanks, with an entrance slot therethrough and suitable guides for theblanks so that when they are fed mechanically or manually into theguides, they will pass between the gaging rollers and directly to thecooling tank.

To illustrate my invention, I annex hereto three sheets of drawings inwhich the saine reference characters are used to designate identicalparts in all the figures, of which-d 'Figure 1 is a longitudinal sectionon the line 1-1 of Fig. 2;

Fig. 2 is a top plan view of the same in section on the line 2-2 of Fig.1;

Fig. 3 is a vertical section on the line 3- of Fig. 2, and

Fig. 4 1s a detail View showing the gears ing at the cnd of themachine'seen in the lower portiouof Fig. 2.

In carrying 'out my invention in its preerred form. I employ a generallyrectangular frame 10 supported upon suitable legs, not shown, and insideof the ame sup- Speciiication of Letters Patent.

Patented Jan. 6,1920.

Renewed November 1, 1919. serial No. 335,110.

a carton dropped with its edge intqt-,he en gaging angle 17 will beseized by the cords 15 and 16 and carried down lthrough the cold waterand discharged at the other end in the manner which is customary inmachines of this character.y The water cooling tank and the associatedcarton carrying mechanism thus far described may be of any desiredconstruction. V

Mounted in the 'end of the framework 10 adjacent to the engaging angle17 is a rod -18 which has fulcrumed on the ends thereof.

the swinging frame vmembers 19 and 20, these frame members beingprovided with `the ears 21 projecting from the rear thereof to engagethe shaft 18.- At the other end of the frame' members they are providedwith the forks or slots 22 through which pass the bolts 23, pivoted attheir lower ends to the frame 10 and provided on their threaded upperends with the wing nuts 24 by which the swinging frame may be secured inits rigid position, the exact level being determined, if. desired', byset screws 25 threaded through the frame pieces near the forks 22 andhaving their lower ends engaging the top of the frame 11. j'

Journaled in the bearings 26 formed` in the frame pieces 19 and 201s ashaft 27 provided on one end with a belt pulley 28 or othersuitable'driving means and on the other end with a spur gear wheel 29which meshes with a similar spur gear wheel 30 secured on the end of theparallel shaft 31` mounted'in the sliding bearings 32, which bearingsare mounted to slide in the waysv 33 formed in the frame pieces 19 and20. The exact position of the shaft 31 is determined by the pair ofhelically coiled compression springs 34 mounted at one end in therecesses 35 of the frame pieces 19 and 20 and having their other endscooperating with the lugs 36 projecting from the adjacent sides of thebearings 32, together with the companion pair of similar springs 37 lthe set screws 39 which are threaded through the ears carried by theframe pieces 19 and 20. The collar 41 pinned on the screw 39 coperateswith the end of the spring 37, and the lock nut 42 serves to secure theset screws 39 in any desired position of adjustment. It will be obviousthat with the construction described, the shaft 31 1s held yieldingly ina certain fixed relationship to` the shaft 27, and rotates therewith.

Secured on the shafts 27 and 31 are th companion rolls 43 and 44, whichare preferably hollow metal rolls having ontheir surface a layer of feltor some similar fiber 45, of the thickness of say one-quarter of l'aninch, such rolls suitably pressed together,r

being known in the art as gaging rolls.

Located beneath the rolls 43 and 44 and supported upon the end of theframe 10 is a tank 45a, which is filled with melted paraffin to a leveldetermined by the overiow pipe 46 extending upthrough the bottomythereof and having the lower end 47 thereof located to discharge .intoany desired overflow receptacle. While I might use a pair of tanks, onefor each of the rolls 43 and 44, with their adjacent edges slightlysupported, I preferably employ f the single tank shown, and provide apassage 48 through the center thereof, this passage being convenientlyformed by cutting an aperture 49 in the bottom of the tank proper, andsoldering to the adjacent edges of the bottom the metal sheets 50, whichconverge, as shown in Fig.

- 1, and are closed toward their ends by the vertical metal. pieces 51soldered thereto. They have the inclined top portions 52 which are-inclined toward the ends of the tank to carry back to the paraiiin tankany droppings lfrom the ends of the rollers 43k and 44; To melt the.paraffin, and keep it in its melted state, I provide a steam supply pipe53 at.one end of the machine which is connected to a set of continuoussteam pipes 54 which form a continuous passage for steamto the steamdischarge pipe55, so that the steam can circulate through the pipes 54.To conserve the heat of the melted paraffin, I preferably cover the tankby a sheet metal cover 56, having the elongated aperture 57 through thetop thereof, and conveniently secured -in place by the set screws 58threaded through the end pieces 19 and 20 and cooperating with therecesses 59 in the ends of the cover 56. To limit the amount of meltedparaiin carried up by the outer sidesof the rollers 43 and 44, Ipreferably extend across the tank adjacent said' edges the scraper bars60.

The blanks to be treated are preferably piled on'the feed board' 61supported at an angle by the arms 62 on the frame, and if the cartonsare to be fed in autOmfitC-lly, I.

wheel 66 secured on the end'of the shaft 64.

Extending between the frame pieces 19 and 20 and secured therein is thespacing rod 67 which has mounted thereon at suitable intervals the wirefingers 68 having their ends extended into the slot 57 of the cover, andopposed to these fingers 68 and coperating therewith are similar wirefingers 69 likewise extending through the aperture 57 and supported fromthe bottom -of the feed board 61. l

The' shaft 27 is provided on one end with a miter gear 70 meshing with amiter gear 71 secured'on the shaft 72 and extending to the other end ofthe framework 10 and connected to the gearing by which the cords 15 and16 are driven in the manner customary in this class f machines. p

The operation` of the complete apparatus will be readily apparent tothose skilled in the art. The rollers 43 and 44 rotate toward each otheron their top-sides and grip any cartons that may be fed down tothem'between the fingers 68l and 69 and through the aperture 57. Thefelt covering of these. rollers carries up a certain amount of themelted parafiin, anyl excess being removed by the scraper bars l60 andthis is applied to the blanks as they-pass between the rollers, anyexcess of the paraiiin being removed by the felt surfaces expandingafter they have been squeezed by the pressure existing between them andthe carton blank. The blanks with they definite amount of paraffin thusapplied pass down through the paage `48 and are' dropped with theirforward edges loo into the water in the cooling tank 11 and" I into theengaging angle of the cords 15 andl 16, so that the blanks While themelted paraiin is still hot on their surface enter immediately into thecooling water and arecooled very suddenly by theirpassage therethrough.

It will be obvious'to those skilled in the art that by thea'pparatus Ihave thus produced, I ain/able to apply a certain fixed amountofparaffln to the blanks, depending upon the pressure applied to therolls by vention as embodied in the form that I at present consider bestadapted to carry out its purpose, it will be understood that it iscapable of some modiications, and that I do not desire to-'be limited inthe interpretation of the following claims except as may benecessitatedby the state oi' the prior art. 1

What I claim as new, Iand desire to secure' by Letters Patent of theUnited States is:

1. In an apparatus of the class described, the combination with acooling water tank having carton carrying means mounted therein, of aparafin tank directly over the receiving end of the cooling water tank,a, pair of gaging rolls journaled in the top ot' the paraffin tank inthe same or substantially the same horizontal plane' and having theirlower sides dipping in the parafl n, gearing tol rotate the rolls inunison, andmeans for regulating the pressure between the rolls, saidtank having a discharge passage through the bottom thereof extendingfrom thediverging angle of the rolls to the top of the cooling watertank.

2. In anappa-ratus of they class described, the combination with acooling Water tank having carton v carrying means mounted therein, ofaparain tank directly over the receiving end of the cooling water tank,a

pair of 0raging rolls journaled in the topof the parain tank in the sameor substantially the same horizontal plane and having their lower sidesdipping inte the parafin, gearing to rotate the rolls in unison, meansfor regulating the pressure between the rolls, said tank having adischarge passage through the bottom thereof extending from thediverging angle of the rolls to the top of the coolin g water tank, acover for the paratiin tank guides` extending through said slot and tothe receiving angle of the rolls.

3. In an apparatus of the class the combination with a cooling watertank having carton carrying means mounted therein,'of a paratlin tankdirectly over the receiving end of the cooling water tank, a swingingframe pivoted at its outer side to the adjacent end of the cooling watertank frame, a pair of gaging rolls journaled in said pivoted frame inthe same or substantially the same horizontal plane and having their-lower sides dipping into the paraliin, gearing carried by said .pivotedframe to rotate the rolls in unison, means also carried by the pivotedframe for regulating the pressure between the rollers, the paraffin tankhaving a discharge passage through the bottom thereof extending from thediverging angle of the rollers to the top of the coolingwater tank, andmeans for securing the pivoted frame in position.

In Witness whereof I have hereunto set my hand and aliixed my seal this20th day of July A. D. 1918.

FRANK r.' vAvRA. [La] Witnesses: v

- C. M. .STUMCKL .TNQ-G.- Emorr.

described,y

aving a receiving lslot therein, and

